Do not overwrite motd attribute of hgwebdir instances on refresh....
Do not overwrite motd attribute of hgwebdir instances on refresh.
This allows using
application = hgwebdir(...)
application.motd = (string or object with __str__ method)
in WSGI (like it is possible in CGI).
Changed web.motd in the config file is still read with this, because
hgwebdir.templater.motd() does not store the config value.
